Piezoelectric device
a technology of piezoelectric and vibrating pieces, which is applied in piezoelectric/electrostrictive/magnetostrictive devices, piezoelectric/electrostriction/magnetostriction machines, electrical equipment, etc., can solve the problem that the piezoelectric device disclosed in patent literature 1 does not allow separately measuring and adjusting the frequency of one of the plurality of piezoelectric vibrating pieces
Inactive Publication Date: 2013-08-15
NIHON DEMPA KOGYO CO LTD
View PDF3 Cites 6 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Benefits of technology
This patent is about a piezoelectric device, which includes a piezoelectric vibrating piece and a base portion. The piezoelectric vibrating piece has a piezoelectric piece with two main surfaces, and a pair of excitation electrodes and a pair of extraction electrodes. The extraction electrodes extend from the excitation electrodes to one short side of the piezoelectric vibrating piece. The base portion has a pair of connecting electrodes and a pair of mounting terminals that connect to the extraction electrodes. The base portion also has four sides, with two pairs of castellations depressed towards the center side of the base portion, and two pairs of side surface electrodes on the castellations. The side surface electrodes connect both the connecting electrodes and the mounting terminals. The technical effect of this design is increased efficiency and reliability of the piezoelectric device, resulting in improved performance and durability.
Problems solved by technology
That is, the piezoelectric device disclosed in Patent Literature 1 does not allow separately measuring and adjusting the frequency of one of the plurality of piezoelectric vibrating pieces, which are fabricated on a wafer scale.
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0018]In this description, an AT-cut quartz-crystal vibrating piece as a piezoelectric vibrating piece is employed. The AT-cut quartz-crystal vibrating piece has a principal surface (in the Y-Z plane) that is tilted by 35° 15′ about the Y-axis of crystallographic axes (XYZ) in the direction from the Z-axis to the Y-axis around the X-axis. The new axes tilted with reference to the axis directions of the AT-cut quartz-crystal vibrating piece are denoted as the Y′ axis and the Z′ axis. This disclosure defines the longer side direction of a crystal unit as the X axis direction, the height direction of the crystal unit as the Y′ axis direction, and the direction perpendicular to the X and Y′ axis directions as the Z′ axis direction.
Overall Configuration of a Quartz-Crystal Device 100
[0019]A description will be given of the overall configuration of the quartz-crystal device 100 with referring to FIG. 1 and FIGS. 2A and 2B. FIG. 1 is an exploded perspective view of the quartz-crystal devic...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
A piezoelectric device includes a piezoelectric vibrating piece and a base portion in a square shape. The piezoelectric vibrating piece includes a piezoelectric piece, a pair of excitation electrodes, and a pair of extraction electrodes. The base portion includes a pair of connecting electrodes on a first surface at a side of the piezoelectric vibrating piece and a pair of mounting terminals on a second surface. The base portion has short sides facing one another. The short sides include two pairs of castellations depressed toward a center side of the base portion and two pairs of side surface electrodes on the two pairs of castellations. The two pairs of side surface electrodes connect the first surface and the second surface. One pair of the two pairs of side surface electrodes each connect to the pair of connecting electrodes and the pair of mounting terminals.
Description
CROSS REFERENCE TO RELATED APPLICATION[0001]This application claims the priority benefit of Japan application serial no. 2012-026286, filed on Feb. 9, 2012. The entirety of the above-mentioned patent application is hereby incorporated by reference herein and made a part of this specification.TECHNICAL FIELD[0002]This disclosure relates to a piezoelectric device where a plurality of lid portions and base portions are allowed to be fabricated in a state of wafer.DESCRIPTION OF THE RELATED ART[0003]It is preferred that a large amount of surface mount piezoelectric devices can be fabricated at a time. A piezoelectric device disclosed in Japanese Unexamined Patent Application Publication No. 2006-148758 (hereinafter referred to as Patent Literature 1) is fabricated such that a quartz-crystal wafer including a plurality of quartz-crystal vibrating pieces is sandwiched between a lid wafer and a base wafer with the same shape as the quartz-crystal wafer. The piezoelectric device disclosed i...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More IPC IPC(8): H01L41/047
CPCH03H9/17H03H2003/022H01L41/047H03H9/1021H03H9/19H03H2003/0485H10N30/875H10N30/87
Inventor ICHIKAWA, RYOICHI
Owner NIHON DEMPA KOGYO CO LTD